Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commit 618f003199c6 ("ext4: fix memory leak in ext4_fill_super"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over. Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd(). Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5e4f5138bd8522ebe231a137682d3857209a2c07 before b663890d854403e566169f7e90aed5cd6ff64f6b; affected eb7b40d9d3785f7a131fb0b1f89bb6efa46c1833 before 7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before 61bb4a1c417e5b95d9edb4f887f131de32e419cb; affected cecfdb9cf9a700d1037066173abac0617f6788df; affected 5.12.18 before 5.13 |
| Linux / Linux | affected 5.10.51 before 5.10.77 |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b
- https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd
- https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.